CN111623452A - Air conditioner heat storage device, air conditioner and control method of air conditioner heat storage device - Google Patents

Air conditioner heat storage device, air conditioner and control method of air conditioner heat storage device Download PDF

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Publication number
CN111623452A
CN111623452A CN202010617830.4A CN202010617830A CN111623452A CN 111623452 A CN111623452 A CN 111623452A CN 202010617830 A CN202010617830 A CN 202010617830A CN 111623452 A CN111623452 A CN 111623452A
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China
Prior art keywords
heat storage
air conditioner
storage material
temperature
air
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CN202010617830.4A
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CN111623452B (en
Inventor
李珊
江悄悄
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Midea Group Co Ltd
GD Midea Air Conditioning Equipment Co Ltd
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Midea Group Co Ltd
GD Midea Air Conditioning Equipment Co Ltd
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0007—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning
    • F24F5/0017—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater cooling apparatus specially adapted for use in air-conditioning using cold storage bodies, e.g. ice
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/41—Defrosting; Preventing freezing
    • F24F11/42—Defrosting; Preventing freezing of outdoor units
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/65—Electronic processing for selecting an operating mode
    • F24F11/67—Switching between heating and cooling modes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/20—Casings or covers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/02—Defrosting cycles
    • F25B47/022—Defrosting cycles hot gas defrosting
    • F25B47/025—Defrosting cycles hot gas defrosting by reversing the cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/20—Heat-exchange fluid temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2221/00—Details or features not otherwise provided for
    • F24F2221/34—Heater, e.g. gas burner, electric air heater
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2347/00—Details for preventing or removing deposits or corrosion
    • F25B2347/02—Details of defrosting cycles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/01—Heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
    • F25B2400/24—Storage receiver heat
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/14—Thermal energy storage

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Thermal Sciences (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention discloses an air conditioner heat storage device, an air conditioner and a control method of the air conditioner heat storage device. Wherein, the inside of the shell is provided with a refrigerant pipeline; the heat storage material is filled in the shell and is positioned between the inner wall of the shell and the refrigerant pipeline; the disturbance assembly comprises a disturbance member inserted in the heat storage material, and an actuator connected with the disturbance member, wherein the actuator is suitable for driving the disturbance member to disturb the heat storage material. The air conditioner heat storage device can improve the uniformity of the heat storage quantity of each position of the heat storage material in the air conditioner heat storage device so as to improve the heat exchange rate of the air conditioner heat storage device.

Description

Air conditioner heat storage device, air conditioner and control method of air conditioner heat storage device
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner heat storage device, an air conditioner and a control method of the air conditioner heat storage device.
Background
When the air conditioner operates in a heating mode under a low-temperature working condition (such as in winter), an outdoor heat exchanger in an outdoor unit is easy to frost, so that the heating capacity of the air conditioner is reduced, and defrosting of the outdoor unit is needed. The traditional air conditioner adopts a refrigerant reverse circulation mode to defrost, namely, the refrigerant flow direction of the four-way valve is switched under a heating mode to switch the current heating mode into a cooling mode, so that high-temperature refrigerant discharged by the compressor enters the outdoor heat exchanger to defrost firstly, and then flows back to the compressor through the indoor heat exchanger. The defrosting mode can reduce the temperature of indoor rooms, greatly reduce the comfort level, and has large temperature fluctuation.
Therefore, there is a heat storage device for an air conditioner that can be applied to an air conditioner, and is connected to a pipe of a refrigerant circulation system of the air conditioner to defrost an outdoor heat exchanger using a heat storage amount of the heat storage device without switching a refrigerant flow direction of the air conditioner. However, the heat storage material in the conventional air-conditioning heat storage device is usually still, and during heating or defrosting, the temperature of one local position of the heat storage material is high, and the temperature of the other local position of the heat storage material is low. That is, the heat storage amount in each position of the heat storage material is not uniform, and thus the heat exchange rate of the heat storage device of the air conditioner is low and the defrosting effect is poor.
Disclosure of Invention
The invention mainly aims to provide an air conditioner heat storage device, aiming at improving the uniformity of heat storage quantity of heat storage materials in the air conditioner heat storage device at all positions so as to improve the heat exchange rate of the air conditioner heat storage device.
In order to achieve the purpose, the invention provides an air conditioner heat storage device which comprises a shell, a heat storage material and a disturbance assembly. Wherein, the inside of the shell is provided with a refrigerant pipeline; the heat storage material is filled in the shell and is positioned between the inner wall of the shell and the refrigerant pipeline; the disturbance assembly comprises a disturbance member inserted in the heat storage material, and an actuator connected with the disturbance member, wherein the actuator is suitable for driving the disturbance member to disturb the heat storage material.
Optionally, the housing includes a housing body for accommodating the heat storage material and a housing cover covering an upper end of the housing body; wherein the driver is mounted on the housing cover; the upper end of the disturbing piece is connected with the driver.
Optionally, the housing cover is provided with an insertion opening for inserting the disturbing element into the housing body, and an annular supporting portion is convexly arranged on the periphery of the insertion opening; the disturbance assembly also comprises a fixing plate for mounting the driver, and the fixing plate covers the insertion opening and is fixedly connected with the annular supporting part.
Optionally, the annular support portion includes two annular support ribs arranged along a radial direction of the annular support portion, and an annular groove is formed between the two annular support ribs; the lower surface of the fixing plate is convexly provided with an annular rib, and the annular rib is inserted into the annular groove.
Optionally, a wire feeding port communicated with the insertion port is formed in a side wall of the annular supporting portion, and the wire feeding port is suitable for a wire of an electric control component in the shell body to pass through.
Optionally, the depth of the interference element extending into the shell is greater than or equal to 1/2 of the depth of the inner cavity of the shell.
Optionally, the disturbance piece comprises a hard body and a thermal insulation material layer arranged on the outer surface of the hard body to wrap the hard body. Optionally, the disturbance member is vibratable relative to the housing to disturb the heat storage material by vibration; alternatively, the disturbance member may be rotatable relative to the housing to disturb the heat storage material by rotating; or the disturbance member may be swingable relative to the housing to disturb the heat storage material by swinging; alternatively, the disturbance member may be liftable with respect to the housing to disturb the heat storage material by being lifted.
Optionally, the air-conditioning heat storage device further comprises a control assembly, wherein the control assembly comprises a controller connected with the driver and a first temperature sensor connected with the controller; the first temperature sensor is disposed at the bottom of the heat storage material.
Optionally, the control assembly further comprises a second temperature sensor connected to the controller, the second temperature sensor being disposed in the middle of the thermal storage material; and/or the air conditioner heat storage device further comprises a third temperature sensor connected with the controller, and the third temperature sensor is arranged on the top of the heat storage material.
Optionally, the air conditioner heat storage device further comprises an electric heating element disposed in the housing, the electric heating element being inserted in the heat storage material in the housing.
Optionally, the electric heating element comprises an electric heating bottom plate and an electric heating main plate vertically arranged on the electric heating bottom plate; the air-conditioning heat storage device is provided with the disturbance parts on one side or two sides of the electric heating main board.
Optionally, the air conditioner heat storage device further includes a heat storage heat exchanger disposed in the casing, the heat storage heat exchanger includes a plurality of fins and refrigerant pipes connecting the plurality of fins in a penetrating manner, and the refrigerant pipes are used to form the refrigerant pipelines.
Optionally, the number of the heat storage heat exchangers is at least two; the two heat storage heat exchangers are respectively arranged on two sides of the electric heating element, refrigerant pipes of the two heat storage heat exchangers are communicated through connecting pipes to form the refrigerant pipeline, an inlet pipe of the refrigerant pipeline is formed on one of the heat storage heat exchangers, and an outlet pipe of the refrigerant pipeline is formed on the other heat storage heat exchanger.
Optionally, the air conditioner heat storage device further comprises two heat exchanger brackets arranged in the casing, and the two heat exchanger brackets are arranged oppositely to respectively correspond to the two heat storage heat exchangers for installation.
The invention also provides an air conditioner which comprises the air conditioner heat storage device. The air conditioner heat storage device comprises a shell, a heat storage material and a disturbance assembly. Wherein, the inside of the shell is provided with a refrigerant pipeline; the heat storage material is filled in the shell and is positioned between the inner wall of the shell and the refrigerant pipeline; the disturbance assembly comprises a disturbance member inserted in the heat storage material, and an actuator connected with the disturbance member, wherein the actuator is suitable for driving the disturbance member to disturb the heat storage material.
Optionally, the air conditioner further comprises a compressor, an outdoor heat exchanger, an indoor heat exchanger and a first throttling device which are connected in sequence; the compressor is provided with an exhaust pipe and an air return pipe;
the air conditioner also comprises a first control valve which is arranged on an air return pipe of the compressor; an inlet pipe of a refrigerant pipeline of the air-conditioning heat storage device is connected to the inlet side of the first control valve, and an outlet pipe of the refrigerant pipeline is connected to the outlet side of the first control valve;
the air conditioner further includes a second control valve and a defrosting pipe, both ends of the defrosting pipe are connected to both ends of the first throttling device, respectively, and the second control valve is disposed on the defrosting pipe.
Optionally, the air conditioner further comprises a first piping, a second piping and a switcher; wherein the first piping connects the outdoor heat exchanger and the first throttle device in this order; the second piping is sequentially connected with the first throttling device and the indoor heat exchanger;
the switch is switchable between a first state and a second state, wherein:
in the first state, the switch communicates the exhaust pipe with the first pipe and communicates the muffler with the second pipe;
in the second state, the switch communicates the return pipe with the first pipe and communicates the exhaust pipe with the second pipe.
Optionally, the air conditioner further includes a second throttling device disposed on the inlet pipe of the refrigerant pipeline.
The invention also provides a control method of the air conditioner, wherein the air conditioner comprises an air conditioner heat storage device; the control method of the air conditioner comprises the following steps:
controlling the air conditioner to operate according to a heating mode;
acquiring the temperature Tw of the outdoor heat exchanger, and comparing the temperature Tw of the outdoor heat exchanger with a defrosting preset temperature Ts prestored in a controller;
obtaining the bottom temperature T of the heat storage material of the air-conditioning heat storage device under the condition that Tw is less than Ts1And the bottom temperature T of the heat storage material is measured1Comparing the temperature with the starting temperature Tr of the electric heating element prestored by the controller;
at T1Under the condition of being less than Tr, the electric heating element is started;
and controlling the air conditioner to be switched to a defrosting mode for operation.
Optionally, after the electric heating element is turned on, before the air conditioner is controlled to switch to the defrosting mode, the control method of the air conditioner further comprises the following steps:
obtaining the middle temperature T of the heat storage material2And top temperature T3；
Contrast maximum difference Δ TmaxThe preset temperature difference delta T is prestored in the controller0(ii) a Wherein the maximum difference value DeltaTmaxIs | T3-T1I and I T2-T1Maximum in |;
at Δ Tmax＞ΔT0And under the condition, controlling the disturbance assembly to be started so as to disturb the heat storage material.
Alternatively, the temperature of the starting temperature Tr of the electric heating element is less than the freezing temperature of the heat storage material.
Optionally, the defrosting preset temperature Ts is in a range of-2 ℃ to Ts < 2 ℃.
According to the technical scheme, the disturbance assembly is arranged on the air-conditioning heat storage device and comprises a disturbance piece inserted in the heat storage material and a driver connected with the disturbance piece, so that the disturbance piece is driven by the driver to disturb the heat storage material, the heat storage material is disturbed to stir and mix the part with the higher temperature and the part with the lower temperature, the temperature of each part of the heat storage material is uniform, the uniformity of the heat storage quantity of each part of the heat storage material is greatly improved, and the heat exchange rate of the air-conditioning heat storage device is effectively improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic diagram of a portion of an air conditioner according to an embodiment of the present invention;
FIG. 2 is a front view of the air conditioning heat storage unit of the present invention;
fig. 3 is a side view of the air-conditioning heat storage apparatus of fig. 2;
FIG. 4 is a cross-sectional view taken along line I-I of FIG. 3;
FIG. 5 is an enlarged view taken at A in FIG. 4;
fig. 6 is a partial structural view of the air-conditioning heat storage apparatus of fig. 3;
FIG. 7 is an exploded view of the thermal storage apparatus of FIG. 3;
FIG. 8 is a schematic view of the housing cover of FIG. 7;
FIG. 9 is a schematic diagram of the cooling mode of the refrigerant system of the air conditioner of the present invention;
FIG. 10 is a schematic diagram of a heating mode of a refrigerant system of the air conditioner of the present invention;
FIG. 11 is a schematic diagram of a defrosting mode of a refrigerant system of the air conditioner according to the present invention;
FIG. 12 is a graph illustrating the effect of the air conditioner of the present invention on the average temperature of the indoor environment during the defrost mode;
FIG. 13 is a flowchart illustrating an embodiment of a method for controlling an air conditioner according to the present invention;
fig. 14 is a detailed flowchart of a control method of the air conditioner in fig. 13.
The reference numbers illustrate:
Figure BDA0002563183210000051
Figure BDA0002563183210000061
the objects, features and advantages of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
Referring to fig. 1, the present invention provides an air conditioner heat storage device 200 and an air conditioner 100 including the air conditioner heat storage device 200. The air-conditioning heat storage device 200 is applied to the air conditioner 100 to defrost the outdoor heat exchanger 120 using the heat stored in the air-conditioning heat storage device 200 without switching the refrigerant flow direction of the air conditioner 100. The uniformity of the heat storage amount of each position of the heat storage material in the air-conditioning heat storage device 200 is better, and the heat exchange rate of the air-conditioning heat storage device 200 can be effectively improved. As for the type of the air conditioner 100, the air conditioner 100 may be a split type air conditioner, or may be an integrated type air conditioner. The split air conditioner comprises an air conditioner outdoor unit and an air conditioner indoor unit, wherein the air conditioner indoor unit can be a wall-mounted air conditioner or a floor-type air conditioner; the integrated air conditioner can be a window type air conditioner or a lifting type air conditioner and the like. The air-conditioning heat storage device 200 will be described first.
Referring to fig. 2 to 4, in an embodiment of the thermal storage device 200 of the air conditioner of the present invention, the thermal storage device 200 of the air conditioner includes a housing 210, a thermal storage material and a disturbance assembly 300. A refrigerant pipeline for connecting with a pipeline of an air conditioner is arranged inside the shell 210; the heat storage material is filled in the shell 210 and is positioned between the inner wall of the shell 210 and the refrigerant pipeline; the disturbance assembly 300 comprises a disturbance member 310 interposed in the thermal storage material, and an actuator 320 connected to the disturbance member 310, the actuator 320 being adapted to drive the disturbance member 310 to disturb the thermal storage material.
Specifically, the housing 210 has an interior cavity; the heat storage material is filled in the inner cavity; the refrigerant pipeline is positioned in the inner cavity and is surrounded by the heat storage material to be fully contacted with the heat storage material, so that the heat exchange rate is improved. The refrigerant pipeline may be a refrigerant pipe of a heat exchanger disposed in the inner cavity, or an additional separately disposed refrigerant pipe, or a flow channel formed by internal components of the housing 210. As will be described in more detail below.
In the process of heating the heat storage material for heat storage or after the heat storage is finished, the driver 320 drives the disturbance piece 310 to disturb the heat storage material, so that the heat storage material is disturbed to stir and mix the part with higher temperature and the part with lower temperature, and further, the temperature of each part of the heat storage material is uniform, and the uniformity of the heat storage quantity of each part of the heat storage material is greatly improved.
As for the shape structure of the disturbance member 310, various design manners are possible. For example, the disturbance element 310 may be a disturbance rod disposed in an elongated shape, a disturbance plate disposed in a plate shape, or a disturbance paddle having paddles. The surface of the disturbance rod or the disturbance plate can be convexly provided with a firing pin bulge or a poking sheet for enhancing the disturbance of the heat storage material, improving the disturbance efficiency and greatly improving the uniformity of the heat storage quantity of each position of the heat storage material.
According to the technical scheme of the invention, the disturbance assembly 300 is arranged on the air-conditioning heat storage device 200, the disturbance assembly 300 comprises a disturbance member 310 inserted in the heat storage material and an actuator 320 connected with the disturbance member 310, so that the disturbance member 310 is driven by the actuator 320 to disturb the heat storage material, the heat storage material is disturbed to stir and mix the part with higher temperature and the part with lower temperature, the temperature of each part of the heat storage material is uniform, the uniformity of the heat storage quantity of each part of the heat storage material is greatly improved, and the heat exchange rate of the air-conditioning heat storage device 200 is further effectively improved.
During defrosting by using the air-conditioning heat storage device 200, the theoretical defrosting time expression is delta t-Qc/Wc under the condition of not considering the influence of factors such as flow delay of refrigerant in a pipeline, action time of a valve, defrosting speed, defrosting water falling and the like; wherein, Δ t is defrosting time, Qc is total heat required by defrosting, and Wc is defrosting heat power. Under the same working condition, the frosting amount of the outdoor heat exchanger 120 is fixed, and Qc is not changed, namely the defrosting time is closely dependent on Wc. Wc is affected by two factors: (1) heat exchange power Wc1 of the outdoor heat exchanger 120, Wc1 ═ K × a × Δ T, where K is the heat exchange coefficient of the outdoor heat exchanger 120, a is the equivalent heat exchange area of the outdoor heat exchanger 120, and Δ T is the defrosting heat transfer temperature difference; (2) the air conditioner 100 provides heat power Wc2 and Wc2 to the outdoor heat exchanger 120, wherein Wx is heat releasing power of the air conditioner heat storage device 200, W1 is heat power of the compressor 110, and We is indoor heat supplying power.
It can be seen from this that: (1) the defrosting time is affected by the heat exchange power of the outdoor heat exchanger 120 and the heat release power of the air-conditioning heat storage device 200; (2) under the condition that parameters such as the outdoor heat exchanger 120 and the compressor 110 of the air conditioner 100 are not changed, the total heat storage amount and the heat release power of the air-conditioning heat storage device 200 are improved, so that the defrosting time can be effectively shortened, and the indoor environment temperature fluctuation is further reduced.
In the air-conditioning heat storage device 200 of the present invention, on the premise of not increasing the size of the air-conditioning heat storage device 200, the heat release power of the heat storage material can be effectively increased by improving the uniformity of the heat storage amount of the heat storage material inside the air-conditioning heat storage device 200, and the heat exchange rate of the heat storage material is greatly increased, so that the heat exchange rate can be increased from the original 18% to more than 45%, and the defrosting time of the air-conditioning heat storage device 200 is greatly reduced. To verify the influence of the air conditioner heat storage device 200 of the present invention on the fluctuation of the indoor ambient temperature, the air conditioner 100 to which the air conditioner heat storage device 200 of the present invention was applied was tested under conditions of 1 ℃ for the indoor ambient temperature, 7 ℃ for the outdoor ambient temperature, and 30 ° for the air conditioner outlet temperature. The following table 1 and the accompanying fig. 12 were obtained:
table 1: variation data of average temperature of indoor temperature
Figure BDA0002563183210000081
When the conventional air conditioner 100 is in the defrosting mode, the flow direction of the refrigerant needs to be switched, so that the indoor environment temperature fluctuates by about 6 ℃. In the present invention, since the heat exchange rate of the heat storage material is improved, it can be seen from table 1 and fig. 12 that the fluctuation of the indoor environment temperature in the defrosting mode of the air conditioner 100 to which the heat storage device 200 of the present invention is applied is about 1 ℃, and the maximum temperature is not more than 2 ℃, and the fluctuation of the indoor environment temperature in the defrosting mode of the conventional heat storage device of the air conditioner is reduced from 6 ℃ to about 1 ℃ or even lower, which is far lower than that of the conventional air conditioner 100, so that the effects of small fluctuation of the indoor environment temperature and good user experience are achieved.
Referring to fig. 2 to 4, according to any of the above embodiments, the heat storage device 200 of the air conditioner further includes an electric heating element 220 disposed in the casing 210, and the electric heating element 220 is inserted into the heat storage material in the casing 210. The heat storage material is electrically heated by the electric heating member 220 so that the heat storage material can quickly store heat. The electric heating element 220 may be an electric bar or an electric plate.
The electric heating member 220 may be disposed at one side of the disturbance member 310, or may be disposed around the disturbance member 310. Here, the electric heating element 220 may include an electric heating bottom plate 221 and an electric heating main plate 222 vertically disposed on the electric heating bottom plate 221; the air-conditioning heat storage device 200 is provided with the disturbance 310 on one side or both sides of the electric heating main board 222. That is, the disturbance element 310 may be one, and the disturbance element 310 may be disposed on any side of the electric heating main board 222; or, the number of the disturbance elements 310 is two, and the two disturbance elements 310 are respectively configured on two sides of the electric heating main board 222, so as to disturb the heat storage materials on two sides of the electric heating main board 222, thereby improving the disturbance efficiency.
Referring to fig. 4, 6 and 7, in an embodiment, the heat storage device 200 of the air conditioner further includes a heat storage heat exchanger 230 disposed in the housing 210, and the heat storage heat exchanger 230 includes a plurality of fins and refrigerant tubes penetrating and connecting the plurality of fins, and the refrigerant tubes are used to form a refrigerant pipeline 231. The number of the heat storage heat exchangers 230 may be one or two and more.
Specifically, the number of the heat storage heat exchangers 230 is at least two. The two heat storage heat exchangers 230 are respectively arranged at both sides of the electric heating member 220, refrigerant pipes of the two heat storage heat exchangers 230 are communicated through a connection pipe 234 to form a refrigerant pipe line 231, an inlet pipe 232 of the refrigerant pipe line 231 is formed at one of the heat storage heat exchangers 230, and an outlet pipe 233 of the refrigerant pipe line 231 is formed at the other heat storage heat exchanger 230.
The electric heating member 220 may be disposed around or in the middle of the regenerative heat exchanger 230. In particular, the electric heating element 220 and the disturbance element 310 are each arranged between two heat storage exchangers 230. In addition, the air-conditioning heat storage device 200 further includes two heat exchanger holders 240 disposed in the housing 210, and the two heat exchanger holders 240 are disposed to face each other so as to be respectively mounted corresponding to the two heat storage heat exchangers 230. The heat exchanger holder 240 has a plurality of fixing hooks 241 formed along the periphery thereof on a side thereof facing away from the other heat exchange holder 240, and the heat storage heat exchanger 230 is held and fixed to the heat exchanger holder 240 by the plurality of fixing hooks 241.
The specific mounting of the perturbation 310 is described in detail below.
Referring to fig. 4 to 6, in an embodiment, the housing 210 includes a housing 211 for accommodating the heat storage material, and a housing cover 212 covering an upper end of the housing 211; wherein, the driver 320 is arranged on the shell cover 212; the upper end of the interference member 310 is connected to the driver 320.
Specifically, the inner cavity for accommodating the heat storage material is formed inside the shell body 211, and the inner cavity is upward and is open; the housing cover 212 covers the upper end of the housing body 211 to cover the opening of the inner cavity (as shown in fig. 7). Mounting the driver 320 on the top surface of the housing cover 212 not only facilitates servicing of the driver 320, but also makes it difficult for the driver 320 to come into contact with the heat storage material. The upper end of the disturbance 310 is connected to the driver 320, and the remaining part of the disturbance 310 is inserted into the thermal storage material in the housing 211 through the housing cover 212. When the cover 212 is detached, the disturbing member 310 can be pulled out from the outside without opening the cover, and the detachment is easy and the operation is easy.
Referring to fig. 4, 5 and 7, in an embodiment, the housing cover 212 is provided with an insertion opening 213 for inserting the disturbing element 310 into the housing body 211, and an annular supporting portion 214 is protruded at a periphery of the insertion opening 213; the disturbing assembly 300 further includes a fixing plate 330 for mounting the driver 320, and the fixing plate 330 covers the insertion opening 213 and is fixedly connected to the annular support portion 214.
Specifically, the fixing plate 330 of the disturbance assembly 300 covers the insertion opening 213, the lower surface of the fixing plate 330 is supported by the annular support portion 214, and the periphery of the fixing plate 330 is fixed to the annular support portion 214 by a snap structure or a screw structure. The driver 320 of the stirring assembly 300 is mounted on the top surface of the fixing plate 330, and the stirring member 310 is inserted from the driver 320 downward through the inlet to the heat storage material in the housing 211.
Referring to fig. 5, 7 and 8, it is considered that, since the insertion port 213 communicates with the inner cavity of the case 210, heat of the heat storage material in the case 210 may be dissipated outward from the insertion port 213. To reduce this, the annular support portion 214 optionally includes two annular support ribs arranged along a radial direction thereof, and the two annular support ribs are spaced by an annular groove 215; the lower surface of the fixing plate 330 is protruded with an annular rib 331, and the annular rib 331 is inserted into the annular groove 215. By inserting the annular rib 331 of the fixing plate 330 into the annular groove 215 of the annular support portion 214, the gap between the fixing plate 330 and the periphery of the insertion opening 213 can be reduced, the air tightness of the housing 210 can be improved, and the heat dissipation from the inside of the housing 210 can be reduced.
Further, a wiring port 216 communicating with the insertion port 213 is formed in the side wall of the annular supporting portion 214, and the wiring port 216 is suitable for a wire of an electric control component in the housing 211 to pass through. The electrically controlled components may be individual temperature sensors or electrical heating elements 220. Because the wire running port 216 is small and just allows a wire with a small diameter to pass through, the heat emitted from the wire running port 216 is small and can be basically ignored.
According to any of the above embodiments, the specific shape and structure of the disturbance element 310 may be designed in various ways, as mentioned above. In this embodiment, the disturbing element 310 is a disturbing rod with a long strip shape, and the disturbing rod has a small volume, so that the occupied disturbing space can be reduced.
Referring to fig. 4, in view of the fact that the temperature of the heat storage material at the bottom of the cavity of the housing 211 is generally low and the temperature of the heat storage material at the top of the cavity of the heat storage device 200 is high during normal operation of the air conditioner, in order to ensure that the heat storage materials at the bottom and the top of the cavity of the housing 211 can be disturbed to be mixed, the depth of the disturbance member 310 extending into the housing 211 is preferably greater than or equal to 1/2 of the depth of the cavity of the housing 211. Therefore, the lower end of the disturbing part 310 can be close to or deep into the bottom of the inner cavity of the shell body 211, and the upper layer and the lower layer of the heat storage material can be disturbed, so that the upper layer and the lower layer of the heat storage material are effectively and uniformly mixed.
For convenience of explanation, assume H0Indicated as the depth of the interior cavity of the body 211Degree, H1The depth of the interference member 310 extending into the housing 211 is shown as H1≥1/2H0Such as but not limited to, for example H1May be equal to 1/2H0、2/3H0、3/4H0And the like.
In one embodiment, since the upper end of the disturbance member 310 needs to penetrate the upper side of the fixed plate to be connected to the driver 320, and the rest of the disturbance member 310 is in contact with the heat storage material, heat of the heat storage material may be conducted outward through the disturbance member 310. Therefore, to avoid this, optionally, the perturbation 310 comprises a hard body and a layer of thermal insulation material disposed on an outer surface of the hard body to wrap the hard body.
The hard body is made of hard material, such as metal or hard plastic, so that the disturbance element 310 has better strength and can strongly disturb the heat storage material. The heat insulating material layer is made of heat insulating materials, and can be a material coating coated on the outer surface of the hard body or a heat insulating sleeve sleeved on the outer side surface of the hard body. The hard body is wrapped by the heat insulation material layer, so that the disturbance piece 310 is separated from the heat storage material, the heat of the heat storage material is difficult to conduct to the hard body through the heat insulation material layer of the disturbance piece 310, and further the heat cannot be conducted out through the disturbance piece 310.
With continued reference to FIG. 4, the disturbance pattern of the disturbance element 310 may also have various designs. In one embodiment, the disturbance element 310 may vibrate relative to the housing 210 to disturb the thermal storage material by vibration. That is, the thermal storage material is vibrated around the disturbance 310 by driving the disturbance 310 by the driver 320 so as to accelerate heat transfer inside the thermal storage material, so that the thermal storage amount is uniform in each part of the thermal storage material.
In another embodiment, the perturber 310 is rotatable relative to the housing 210 to perturb the thermal storage material by rotation. Specifically, the upper end of the disturbance member 310 is rotatably connected to the housing cover 212, the disturbance member 310 has a rotation axis aligned with the length direction thereof, and the disturbance member 310 is driven by the driver 320 to rotate around the rotation axis to stir the heat storage material, thereby accelerating the heat transfer inside the heat storage material and also making the heat storage amount of each part of the heat storage material uniform.
In yet another embodiment, the disturbance 310 may be swingable with respect to the housing 210 to disturb the thermal storage material by swinging. For example, the interfering member 310 may swing left and right or back and forth. That is, the disturbance member 310 corresponds to a swing arm, and the disturbance member 310 is driven by the driver 320 to swing back and forth, so that the heat storage material can be stirred, the heat transfer in the heat storage material can be accelerated, and the heat storage amount in each part of the heat storage material can be made uniform.
In one embodiment, the disturbing member 310 is liftable with respect to the housing 210 to disturb the thermal storage material by being lifted. For example, a stirring piece is arranged at the lower end of the stirring piece 310, the driver 320 drives the stirring piece 310 to move up and down, and the heat storage material is stirred by pushing and pulling up and down, so that the heat storage material on the upper layer and the heat storage material on the lower layer can be uniformly stirred, and the heat storage amount of each part can be uniform more quickly.
Based on any of the above embodiments, for the timing of turning on the disturbance assembly 300, the disturbance assembly 300 may be turned on at the same time as the air-conditioning heat storage device 200 turns on the electric heating plate to heat the heat storage material; it is also possible to turn on the perturbing member 300 after the heating is finished. The first opening mode is adopted.
Referring to fig. 6 and 7, in an embodiment, the air-conditioning heat storage device 200 further includes a control component, where the control component includes a controller connected to the driver 320, and a first temperature sensor 250 connected to the controller; a first temperature sensor 250 is provided at the bottom of the heat storage material for detecting the bottom temperature T of the heat storage material1And detecting the bottom temperature T thereof1And feeds back to the controller for the controller to determine whether the perturbation component 300 needs to be turned on.
Further, the control unit further includes a second temperature sensor (not shown) connected to the controller, the second temperature sensor being disposed in the middle of the heat storage material for detecting the middle temperature of the heat storage materialDegree T2And detecting the middle temperature T thereof2Feeding back to the controller for the controller to determine whether the disturbing component 300 needs to be turned on; and/or the air-conditioning heat storage device 200 further includes a third temperature sensor (not shown) connected to the controller, the third temperature sensor being provided on top of the heat storage material for detecting the top temperature T of the heat storage material3And detecting the middle temperature T thereof3And feeds back to the controller for the controller to determine whether the perturbation component 300 needs to be turned on.
Referring to fig. 1 and fig. 9, the present invention further provides an air conditioner 100, the air conditioner 100 includes an air conditioner heat storage device 200, the specific structure of the air conditioner heat storage device 200 refers to the above embodiments, and since the air conditioner 100 adopts all technical solutions of all the above embodiments, at least all the beneficial effects brought by the technical solutions of the above embodiments are at least provided, and are not described herein again.
In one embodiment, the air conditioner further includes a compressor 110, an outdoor heat exchanger 120, an indoor heat exchanger 130, and a first throttling device 140 connected in sequence; the compressor 110 has a discharge pipe 111 and a return pipe 112. The air conditioner further includes a first control valve 170, the first control valve 170 being provided on the return pipe 112 of the compressor 110; an inlet pipe 232 of a refrigerant pipe 231 of the air-conditioning heat storage device 200 is connected to an inlet side of the first control valve 170, and an outlet pipe 233 of the refrigerant pipe 231 is connected to an outlet side of the first control valve 170. The air conditioner further includes a second control valve 180 and a defrosting pipe 101, both ends of the defrosting pipe 101 are connected to both ends of the first throttling device 140, respectively, and the second control valve 180 is provided on the defrosting pipe 101.
For the first throttling device 140, there are various implementations, such as a throttling valve, a capillary tube, an electronic expansion valve, etc. In particular, the first throttle device 140 is a throttle valve. The first control valve 170 and the second control valve 180 may employ solenoid valves.
When the air conditioner is in the heating mode, the first control valve 170 is opened, the second control valve 180 is closed, and the refrigerant flows back to the interior of the compressor 110 through the discharge pipe 111 of the compressor 110, the indoor heat exchanger 130, the first throttling device 140, the outdoor heat exchanger 120, and the return pipe 112 of the compressor 110 in sequence. In this process, the refrigerant does not pass through the air-conditioning heat storage device 200.
When the air conditioner is in the defrosting mode, the first control valve 170 is closed, the second control valve 180 is opened, and the refrigerant flows through the exhaust pipe 111 of the compressor 110, the indoor heat exchanger 130, the defrosting pipe 101, the second control valve 180, the outdoor heat exchanger 120, the inlet side of the first control valve 170 of the air return pipe 112 of the compressor 110, the inlet connection pipe 232 of the air-conditioning heat storage device 200, the refrigerant pipeline 231, the outlet connection pipe 233, and the outlet side of the first control valve 170 of the air return pipe 112 of the compressor 110 in sequence and flows back to the inside of the compressor 110.
Further, the air conditioner further includes a first pipe 102, a second pipe 103, and a switch 160; wherein the first pipe 102 connects the outdoor heat exchanger 120 and the first throttling device 140 in this order; the second pipe 103 connects the first throttle device 140 and the indoor heat exchanger 130 in this order. The switch 160 is switchable between a first state and a second state, wherein: in the first state, the switch 160 connects the exhaust pipe 111 to the first pipe 102 and connects the muffler 112 to the second pipe 103; in the second state, the switch 160 connects the return pipe 112 to the first pipe 102 and connects the exhaust pipe 111 to the second pipe 103.
Specifically, the switch 160 is in the first state, the air conditioning system is in the cooling mode; in the second state of the switch 160, the air conditioning system is in a heating state or a defrosting mode. The air conditioner can be switched between a cooling mode and a heating mode by providing the switch 160. The switch 160 may be a four-way valve or two-way valves. The switch 160 is a four-way valve, and four ports of the switch 160 are connected to the first pipe 102, the second pipe 103, the exhaust pipe 111, and the return pipe 112, respectively.
Further, the air conditioner further includes a second throttling device 150, and the second throttling device 150 is disposed on the inlet pipe 232 of the refrigerant pipeline 233. There are various implementations of the second throttling device 150, such as a throttling valve, a capillary tube, an electronic expansion valve, etc. Specifically, the second throttling device 150 is a capillary tube.
The respective modes of the air conditioning system are explained in detail as follows:
referring to fig. 9, in the cooling mode of the air conditioner 100, the switch 160 is switched to the first state, the compressor 110 discharges the high-temperature and high-pressure refrigerant from the discharge pipe 111, and then the refrigerant enters the outdoor heat exchanger 120 from the first pipe 102 to be liquefied, and the liquefied refrigerant enters the indoor heat exchanger 130 through the first throttling device 140 to be evaporated and cooled. Then, the gaseous refrigerant evaporated and discharged from the indoor heat exchanger 130 flows back to the compressor 110 through the second pipe 103, the switch 160, and the return pipe 112, and circulates again, thereby cooling the air. In this mode, the first control valve 170 is open and the second control valve 180 is closed.
Referring to fig. 10, in the heating mode of the air conditioner 100, the switch 160 is switched to the second state, the compressor 110 discharges the high-temperature and high-pressure refrigerant from the exhaust pipe 111, and then the refrigerant enters the indoor heat exchanger 130 from the second pipe 103 to be liquefied, and the refrigerant is liquefied in the indoor heat exchanger 130 to release heat, thereby realizing heating; the liquefied liquid refrigerant enters the outdoor heat exchanger 120 through the first throttling device 140 to be evaporated; then, the gaseous refrigerant evaporated and discharged from the outdoor heat exchanger 120 flows back to the compressor 110 through the first pipe 102, the switch 160, and the return pipe 112, and circulates again, thereby achieving heating. In this mode, the first control valve 170 is open and the second control valve 180 is closed.
When the outdoor heat exchanger 120 is frosted in the heating mode, the state of the switch 160 remains unchanged, but the first control valve 170 is switched to the closed state and the second control valve 180 is switched to the open state, thereby switching the heating mode to the defrosting mode.
Referring to fig. 11, in the defrosting mode, the compressor 110 discharges a high-temperature and high-pressure refrigerant from the exhaust pipe 111, and then enters the indoor heat exchanger 130 from the second pipe 103 to be liquefied, and part of the refrigerant is liquefied in the indoor heat exchanger 130 to release heat, so as to achieve heating; the refrigerant in the gas-liquid coexisting state flowing out of the indoor heat exchanger 130 enters the outdoor heat exchanger 120 through the defrosting pipe 103 and the second control valve 180 to be liquefied again, and the frost of the outdoor heat exchanger 120 is melted by the heat released by the liquefaction, so that the defrosting is realized; then, the liquid refrigerant liquefied and discharged from the outdoor heat exchanger 120 flows into the inlet connection pipe 232 of the air-conditioning heat storage apparatus 200 through the first pipe 102 and the switch 160, enters the refrigerant pipe 231 through the inlet connection pipe 232, exchanges heat with the heat storage material of the air-conditioning heat storage apparatus 200 therein, is gasified to form a gaseous refrigerant, and finally returns to the compressor 110 through the outlet connection pipe 233 and the return pipe 112 to be recirculated.
As can be seen from the above switching from the heating mode to the defrosting mode, during the switching process, the state of the switch 160 is not changed, the flow direction of the refrigerant in the refrigerant system of the air conditioner 100 is kept unchanged, the indoor heat exchanger 130 of the air conditioner 100 is kept in the heating state and is not changed into the cooling state, and the defrosting time can be shortened to within 3 minutes each time, so that the fluctuation of the indoor ambient temperature is about 1 ℃ and is not more than 2 ℃. Compared with the indoor environment temperature fluctuation of 6 ℃ in the defrosting mode that the flow direction of the refrigerant needs to be switched in the traditional air conditioner 100, the air conditioner 100 disclosed by the invention can keep the indoor environment temperature fluctuation small, ensure that the air conditioner 100 normally supplies heat to the indoor space, improve the comfort level of the air conditioner 100 and achieve a better user experience effect.
The air conditioner 100 includes an indoor unit and an outdoor unit, wherein the indoor heat exchanger 130 is installed in the indoor unit, and the compressor 110, the outdoor heat exchanger 120, and the air-conditioning heat storage device 200 are installed in the outdoor unit. Optionally, the outdoor unit of the air conditioner is further provided with a mounting bracket 400 at one side of the compressor 110, and the mounting bracket 400 includes a base 410 and a mounting frame 420 arranged around the base 410; the air-conditioning heat storage device 200 is mounted in the mounting frame 420 of the mounting frame 400.
The present invention further provides a control method of an air conditioner, wherein the air conditioner 100 includes an air conditioning heat storage device 200, and the specific structures of the air conditioner 100 and the air conditioning heat storage device 200 refer to the above embodiments, and since the air conditioner 100 adopts all technical solutions of all the above embodiments, at least all the beneficial effects brought by the technical solutions of the above embodiments are provided, and no further description is provided herein.
In one embodiment, the control method of the air conditioner includes the steps of:
and step S10, controlling the air conditioner 100 to operate according to a heating mode.
Specifically, in step S10, the air conditioner 100 may control the air conditioner 100 to operate in a heating mode after receiving a heating instruction from a remote controller; or when the air conditioner 100 detects that the indoor temperature is less than or equal to the heating mode starting temperature, controlling the air conditioner 100 to operate according to the heating mode.
Step S20, obtaining a temperature Tw of the outdoor heat exchanger 120, and comparing the temperature Tw of the outdoor heat exchanger 120 with a defrosting preset temperature Ts pre-stored in the controller;
step S30, under the condition Tw < Ts, obtains the bottom temperature T of the heat storage material of the air-conditioning heat storage device 2001And the bottom temperature T of the heat storage material is measured1Comparing the starting temperature Tr of the electric heating element 220 prestored by the controller;
specifically, in this step S30, the temperature Tw of the outdoor heat exchanger 120 gradually decreases with the operation of the heating mode. When the temperature Tw of the outdoor heat exchanger 120 is greater than or equal to the preset defrosting temperature Ts, it indicates that the outdoor heat exchanger 120 is not frosted or has a small amount of frosting, and at this time, the air conditioner 100 may be controlled to continue to operate in the heating mode or not. When the temperature Tw of the outdoor heat exchanger 120 is less than the preset defrosting temperature Ts, it indicates that defrosting is required, and thus the bottom temperature T of the heat storage material is obtained1And comparing the start temperature Tr of the electric heating member 220 prestored in the controller to judge whether the electric heating member 220 needs to be turned on to store heat in the air-conditioning heat storage device 200.
For the defrosting preset temperature Ts, the range of Ts may be greater than or equal to-2 ℃ and less than or equal to 2 ℃, i.e., -2 ℃ ≦ Ts ≦ 2 ℃, e.g., Ts ═ 0 ℃. When Ts is more than or equal to 0 ℃ and less than or equal to 2 ℃, the outdoor heat exchanger 120 does not frost, and when Ts is more than or equal to-2 ℃ and less than or equal to 0 ℃, the frosting amount of the outdoor heat exchanger 120 is less and is not enough to influence the normal heating of the air conditioner.
Step S40, at T1Under the condition of < TrThe electric heating element 220 is turned on.
Specifically, in this step S40, as the air conditioner 100 operates in the defrosting mode, the amount of heat stored in the heat storage material in the air-conditioning heat storage device 200 gradually decreases, and the temperature gradually decreases, so that when the bottom temperature T of the heat storage material is reached1When the temperature is reduced to be lower than the starting temperature Tr of the electric heating element 220, the electric heating element 220 is turned on to heat the heat storage material, and the heat storage amount of the air-conditioning heat storage device 200 is supplemented to provide a sufficient heat exchange amount for defrosting the outdoor heat exchanger 120, so that the air conditioner 100 can continuously and stably defrost the outdoor heat exchanger 120. When the bottom temperature T of the heat storage material1When the starting temperature Tr of the electric heating element 220 is not less than or equal to the starting temperature Tr, the heat of the heat storage material is still sufficient, and the heat exchange amount does not need to be supplemented.
In step S50, the air conditioner 100 is controlled to switch to a defrosting mode to defrost the temperature of the outdoor heat exchanger 120.
Further, after the electric heating element 220 is turned on, before the air conditioner is controlled to switch to the defrosting mode, the control method of the air conditioner further comprises the following steps:
step S41, obtaining the middle temperature T of the heat storage material2And top temperature T3；
Step S42, comparing the delta TmaxThe preset temperature difference delta T is prestored in the controller0(ii) a Wherein, Delta TmaxIs | T3-T1I and I T2-T1Maximum in |;
step S43, at Δ Tmax＞ΔT0Under the condition, the disturbance component 300 is controlled to be started to disturb the heat storage material.
In particular, when the maximum difference Δ T ismaxLess than a predetermined temperature difference Δ T0In this case, the difference between the temperature of the bottom of the heat storage material in the heat storage device 200 of the air conditioner and the temperature of the heat storage material at each interlayer position is small, that is, the heat storage amount at each interlayer position of the heat storage material is uniform, and the heat exchange rate is high. When the maximum difference value is Delta TmaxGreater than a predetermined temperature difference Δ T0In the drawings, the heat storage material in the heat storage device 200 of the air conditioner is shownThe temperature difference between the bottom of the material and the temperature difference between the middle and the top of the material is large, namely the heat storage amount of each interlayer position of the heat storage material is uneven, at the moment, the disturbance assembly 300 is controlled to be started to disturb the heat storage material, so that the heat storage material is disturbed respectively to enable the heat storage amount of each interlayer position to be uniformly distributed. Further, in this step, the middle temperature T of the heat storage material can be obtained simultaneously2And top temperature T3Of course, only either one of them may be acquired. Delta T0The range of (B) may be 2 ℃ to 3 ℃.
Further, the temperature of the starting temperature Tr of the electric heating element 220 is less than the freezing temperature of the heat storage material. The reason for this is that, during the defrosting test of the air-conditioning heat storage device 200, it was found that the temperature of the bottom of the heat storage material was lower than the temperature of the middle or top thereof, so that there was a possibility that freezing occurred at the bottom of the heat storage material. Therefore, in the aforementioned step S30, by limiting the temperature of the starting temperature Tr of the electric heating element 220 to be less than the freezing temperature of the heat storage material, the bottom temperature T of the heat storage material can be ensured1Before the starting temperature Tr of the electric heating element 220 is reached, i.e., before the bottom heat storage material is not frozen, the electric heating element 220 is turned on to prevent the heat storage material from freezing.
The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (23)

1. An air conditioner heat storage device, characterized by comprising:
the air conditioner comprises a shell, wherein a refrigerant pipeline used for being connected with a pipeline of an air conditioner is arranged in the shell;
the heat storage material is filled in the shell and is positioned between the inner wall of the shell and the refrigerant pipeline; and
the disturbance assembly comprises a disturbance piece inserted in the heat storage material and a driver connected with the disturbance piece, and the driver is suitable for driving the disturbance piece to disturb the heat storage material.
2. An air-conditioning heat storage apparatus according to claim 1, wherein said housing includes a housing body for accommodating said heat storage material and a housing cover covering an upper end of said housing body; wherein the driver is mounted on the housing cover; the upper end of the disturbing piece is connected with the driver.
3. An air conditioner heat storage device as defined in claim 2, wherein said shell cover is provided with an insertion opening for inserting said disturbance element into said shell body, and the periphery of said insertion opening is convexly provided with an annular support portion; the disturbance assembly also comprises a fixing plate for mounting the driver, and the fixing plate covers the insertion opening and is fixedly connected with the annular supporting part.
4. An air-conditioning heat storage apparatus according to claim 3, wherein said annular support portion includes two annular support ribs arranged in a radial direction thereof, and an annular groove is formed between the two annular support ribs; the lower surface of the fixing plate is convexly provided with an annular rib, and the annular rib is inserted into the annular groove.
5. An air-conditioning heat storage device according to claim 3, characterized in that the side wall of the annular support portion is provided with a wire inlet communicated with the insertion port, and the wire inlet is adapted to allow a wire of an electric control component in the housing to pass through.
6. An air-conditioning thermal storage apparatus according to any one of claims 1 to 5, characterized in that said disturbance element extends into said casing to a depth greater than or equal to 1/2 of the depth of the cavity of said casing.
7. An air-conditioning thermal storage device according to any one of claims 1 to 5, wherein said disturbance element comprises a hard body and a layer of thermal insulation material provided on an outer surface of said hard body so as to wrap said hard body.
8. An air-conditioning thermal storage apparatus according to any one of claims 1 to 5, wherein said disturbance member is vibratable relative to said housing to disturb said thermal storage material by vibration; or,
the disturbance member is rotatable relative to the housing to disturb the heat storage material by rotating; or,
the disturbing member is swingable relative to the housing to disturb the heat storage material by swinging; or,
the disturbing member is liftable relative to the housing to disturb the heat storage material by being lifted.
9. An air-conditioning thermal storage apparatus according to any one of claims 1 to 5, further comprising a control assembly including a controller connected to said actuator, and a first temperature sensor connected to said controller; the first temperature sensor is disposed at the bottom of the heat storage material.
10. An air conditioner heat storage apparatus as claimed in claim 9, wherein said control assembly further includes a second temperature sensor connected to said controller, said second temperature sensor being disposed in the middle of said heat storage material; and/or the air conditioner heat storage device further comprises a third temperature sensor connected with the controller, and the third temperature sensor is arranged on the top of the heat storage material.
11. An air-conditioning heat storage apparatus according to any one of claims 1 to 5, further comprising an electric heating element disposed in the casing, the electric heating element being inserted in the heat storage material in the casing.
12. An air-conditioning heat storage device according to claim 11, wherein said electric heating element includes an electric heating base plate and an electric heating main plate provided upright on said electric heating base plate; the air-conditioning heat storage device is provided with the disturbance parts on one side or two sides of the electric heating main board.
13. An air conditioner heat storage apparatus as claimed in any one of claims 1 to 5, further comprising a heat storage heat exchanger disposed within said housing, said heat storage heat exchanger including a plurality of fins and coolant tubes connecting said plurality of fins therethrough, said coolant tubes being arranged to form said coolant lines.
14. An air-conditioning thermal storage apparatus according to claim 13, wherein the number of said thermal storage heat exchangers is at least two; the two heat storage heat exchangers are respectively arranged on two sides of the electric heating element, refrigerant pipes of the two heat storage heat exchangers are communicated through connecting pipes to form the refrigerant pipeline, an inlet pipe of the refrigerant pipeline is formed on one of the heat storage heat exchangers, and an outlet pipe of the refrigerant pipeline is formed on the other heat storage heat exchanger.
15. An air conditioner heat storage apparatus as claimed in claim 14, further comprising two heat exchanger supports disposed within said housing, said two heat exchanger supports being disposed in opposition to each other for mounting of two of said heat storage heat exchangers, respectively.
16. An air conditioner characterized in that it comprises the air conditioner heat storage device as recited in any one of claims 1 to 15.
17. The air conditioner according to claim 16, further comprising a compressor, an outdoor heat exchanger, an indoor heat exchanger, and a first throttling device connected in series; the compressor is provided with an exhaust pipe and an air return pipe;
the air conditioner also comprises a first control valve which is arranged on an air return pipe of the compressor; an inlet pipe of a refrigerant pipeline of the air-conditioning heat storage device is connected to the inlet side of the first control valve, and an outlet pipe of the refrigerant pipeline is connected to the outlet side of the first control valve;
the air conditioner further includes a second control valve and a defrosting pipe, both ends of the defrosting pipe are connected to both ends of the first throttling device, respectively, and the second control valve is disposed on the defrosting pipe.
18. The air conditioner of claim 17, further comprising a first piping, a second piping, and a switcher; wherein the first piping connects the outdoor heat exchanger and the first throttle device in this order; the second piping is sequentially connected with the first throttling device and the indoor heat exchanger;
the switch is switchable between a first state and a second state, wherein:
in the first state, the switch communicates the exhaust pipe with the first pipe and communicates the muffler with the second pipe;
in the second state, the switch communicates the return pipe with the first pipe and communicates the exhaust pipe with the second pipe.
19. The air conditioner as claimed in claim 17, further comprising a second throttling means provided on an inlet pipe of the refrigerant pipe.
20. A control method of an air conditioner, characterized in that the air conditioner is the air conditioner according to any one of claims 16 to 19; the control method of the air conditioner comprises the following steps:
controlling the air conditioner to operate according to a heating mode;
acquiring the temperature Tw of the outdoor heat exchanger, and comparing the temperature Tw of the outdoor heat exchanger with a defrosting preset temperature Ts prestored in a controller;
obtaining the bottom temperature T of the heat storage material of the air-conditioning heat storage device under the condition that Tw is less than Ts1And the bottom temperature T of the heat storage material is measured1Comparing the temperature with the starting temperature Tr of the electric heating element prestored by the controller;
at T1Under the condition of being less than Tr, the electric heating element is started;
and controlling the air conditioner to be switched to a defrosting mode for operation.
21. The control method of an air conditioner as claimed in claim 20, wherein the control method of an air conditioner further comprises the steps of, after turning on the electric heating elements, before controlling the air conditioner to be switched to the defrosting mode operation:
obtaining the middle temperature T of the heat storage material2And top temperature T3；
Comparison of maximum Difference △ Tmax△ T preset temperature difference with the controller0Wherein the maximum difference value is △ TmaxIs | T3-T1I and I T2-T1Maximum in |;
at △ Tmax＞△T0And under the condition, controlling the disturbance assembly to be started so as to disturb the heat storage material.
22. The control method of an air conditioner according to claim 20, wherein a temperature of a starting temperature Tr of said electric heating element is less than a freezing temperature of said heat storage material.
23. The control method of an air conditioner according to claim 20, wherein the defrosting preset temperature Ts is in a range of-2 ℃ to Ts 2 ℃.
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